Engine



Sept. 14 1926.

G. H. ROBERTS I ENGINE Filed July 9, 1925 2 Sheets-fined 1 ENGINE Filed July 9 1.925

2 Sheets-Sheet 2 Patented Sept. 14, 1926, l 1 5991 UNITED STATES PATENT QFFICE.

GEORGE HARVEY ROBERTS, OF OQUAWKA, ILLINOIS, ASSIGNOR OF ONE-HALF TO LEN-ARI) SCI-TELL, OF OQUAWKA, ILLINOIS.

ENGINE.

Application filed July 9, 1825. Serial No. 42,511.

This invention aims to provide a novel valve 9 opens outwardly. There is a valve engine wherein a hollow piston reciprocates 10 at the place where the bypass pipe 3 within a cylinder and about an abutmentcommunicates with the cylinder. The valve which is fixed within the piston and within 10 opens outwardly. The cylinder 1 is prothe cylinder. vided with openings 11 and 12. A spark It is within the province of the disclosure plug 14 is mounted in the opening 11. A to improve generally and to enhance the spark plug 15 is mounted in the opening 12. utility of devices of that type to which the The numeral 16 designates a carburetor. invention appertains. A pipe 17 leads from the carburetor 16 to lVith the above and other objects in view one end of thecylinder 1. A pipe 18 leads 55 which will appear as the description profrom the carburetor 16 to the other end of ceelds, the invention resides in the combina the cylinder 1. There is a valve 19 at the plane. 21 carries packing rings cooperating with tion and arrangement of parts and in the place where the pipe 18 joins the cylinder details of construction hereinafter described 1. The valve 19 opens inwardly. There is and claimed, it being understood" that yalve '20 at the place where the pipe 17 Ta changes in the precise embodiment of the Joins the cylinder 1. The valve 20 opens inventionherein disclosed, may be made inwardly.

within the scope of what is claimed,-with- The .numeral 21 designates a hollow pisout departing from the spirit of the inventon. The abutment 2 is located within the tion. piston 21 and the piston reciprocates be- In the accompanying drawings tween the abutment and the cylinder 1. The

Figure 1 shows in top plan, a device conpiston 21 is closed at its ends. The piston structed in accordance with the invention; 21 is provided at one end with a rod 22 Figures 2, 3 and 4 are sections taken, respecworking in a gland 23 on the corresponding tively, on the lines '22, 33 and 44 of end of the cylinder 1. There are elongated 319 Figure 1; Figure 5 is a longitudinal secslots 24 in the piston 21. The slots 24 retion wherein arts appear in elevation, the ceive the inner ends of the by-pass pipes 3 view being diagrammatic, since as many and 4, so that the piston can reciprocate parts as possible have been brought into one with respect to the abutment 2. The piston The engine forming the subject matter the cylinder 1. The abutment 2 has packof this application comprises a cylinder 1. ing rings 26 COOPGIELtlHg with the piston 21. Within the cylinder 1 is located a fixed abut- The cylinder 1 is supplied with exhaust ment 2. By-pass pipes 3 and 4 are pro ports 27 and 28. The exhaust ports 27 and vided. The inner ends of the by-pass pipes 28 communicate with an exhaust pipe 29. 9 3 and 4 are connected to the cylinder 1 and The piston 21 has exhaust ports 30 and 31. to the abutment 2. In this way, the abut- The exhaust port 30 of the piston 21 is ment 2 is held in place. The outer ends of adapted to communicate with the exhaust the by-pass pipes 3 and 4 are connected to port 27 of the cylinder 1. The exhaust port the cylinder 1 and communicate with the 31 of the piston 21 is adapted to communicylinder 1 at the ends of the cylinder. The cate with the exhaust port 28 of the cylinder by-pass pipe 3 communicates with a channel 1. The piston 21 is provided near to its 5 in the abutment 2. The channel 5 extends ends with firing ports 32 and 33. The firing from the side of the abutment, to one end port 32 is adapted to register with the spark of the abutment. The by-pass pipe 4 complug opening 12 in the cylinder 1. The fir- '109 municates with a channel 6 in the abutment ing port 33 is adapted to register with the 2. The channel 6 extends from the side of spark plug opening 11 of the cylinder 1. the abutment to the end of the abutment. When the piston 21 moves to the left in A spring-operated valve 7 is carried by the Figure 5, the charge is sucked into the right abutment 2 at one end thereof and controls end of the cylinder through the pipe 18. the channel 5. A spring-operated valve 8 the valve 19 opening, and the valve 9 closis located at the other end of the abutment ing. lVhen the piston 21 movesto the right. 2 and controls the channel 6. There is a the valve 19 closes, the valve 9 opens, the valve 9 at the place where the by-pass pipe valve 8 opens, and the charge passes from 4 communicates with the cylinder 1. The the right end of the cylinder 1 through the 119 pipe a and the channel 6 into the left hand end of the piston 21 and is compressed. By the time that the piston 21 moves to the end or" its compression stroke, the port 32 registers with the port 12 and the charge is fired, the piston 21 moving to the left, and the exhaust leaving through the registering ports 30 and 27. The operation has been traced out from the right hand end of the cylinder 1, but it will be understood, without further description, what takes place when the charge enters at the left hand end of the cylinder, by way of the pipe 17.

A receptacle 34 is mounted on the cylinder 1, and communicates through an opening 35 with the water jacket 36 of the cylinder 1. As shown at 37, the inner wall of the cylinder 1. the piston 21 and the abutment 2 have registering openings 37 by which water can circulate through the hollow abutment 2, about the channels 5 and 6.

I claim 1- 1.111 an internal combustion engine, a cylinder, an abutment fixed within the cylinder, a piston mounted for right line reciprocation Within the cylinder and around the abutment, the abutment having chan nels leading from its sides to its ends, valves on the abutment at the ends of the channels, by-passes leading from the ends of the cylinder to the sides of the abutment and communicating with the channels, valves controlling the by-passes, means for exhausting the spaces within the piston at the ends of the abutment, and means for firing charges in said spaces.

2. In an internal combustion engine, a cylinder, an abutment fixed within the cylinder, a piston mounted for right-line reciprocation within the cylinder and around the abutment, the abutment havingchannels leading from its sides to its ends, by-passes leading from the ends of the cylinder to the sides of the abutment and communicating with the channels, Valves controlling the by-passes, means for exhausting the spaces within the piston at the ends of the abutment, means for firing charges in the said spaces, inwardly closing valves carried by the abutment and controlling the channels, and spring means for seating the last-specified vavles.

In testimony as my own, 1 nature.

GEORGE HARVEY ROBERTS.

that I claim the foregoing have hereto affixed my sig- 

